Question: Who gave the {has sister} of {marriage partner} of {Jacqueline Kennedy Onassis} ?
Paraphrase: Who gave the {has sister} of {marriage accomplice} of {Jacqueline Kennedy Onassis} ?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q165421 wdt:P26 ?X . ?X wdt:P3373 ?answer}
Answer: Robert F. Kennedy, Ted Kennedy, Rosemary Kennedy, Kathleen Cavendish, Jean Kennedy Smith, Eunice Kennedy Shriver, Patricia Kennedy Lawford, Joseph P. Kennedy Jr.